A105822: Is it a permutation of positive integers?
זקיר סעידוב - ד\"ר/Zakir Seidov Ph.D.
zakirs at yosh.ac.il
Fri Apr 22 09:22:48 CEST 2005
Dear SeqFans,
just submitted A105822 (see below).
My request to SEQGurus:
Is it a permutation of positive integers?
Among first 2000 terms,
first missing numbers are 233, 349, 394, 443, 449.
Thanks,
Zak
%I A105822
%S A105822
1,2,3,5,8,4,12,7,10,17,6,11,21,32,13,19,14,33,20,28,24,27,42,40,18,9,35,44,39,54,48,22,15,37,
52,89,30,59,23,36,99,70,16,86,47,45,92,65,157,34,123,135,222,56,136,82,29,53,102,155,25,130,
87,43,170,213,63,150,57,66,96,72,60,100,125,111,236,91,145,74,71,154,177,81,258,95,112,64,
156,55,50,105,98,203,31,84,115,106,77,183,144,327
%N A105822 For n > 2, a(n) > 0 not appeared previously is such that
a(n-1)^2+4*a(n-2)*a(n)=d^2 is a minimal square, a(1)=1, a(2)=2.
%C A105822 Is it a permutation of positive integers?
Among first 2000 terms, first missing numbers are 233, 349, 394, 443, 449.
The sequence depends on seed terms a(1) and a(2); if a(1) = 1, a(3) = a(2)+1.
Values of d^2 in A105823. Cf. A105734.
%Y A105822 A105734, A105823.
%O A105822 1
%K A105822 ,nonn,
%A A105822 Zak Seidov (zakseidov at yahoo.com), Apr 22 2005
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